Which of the following equations represents a proportional relationship? A: y = 3x
B: y = 1/2x + 1
C: y = x/3 + 4
D: y = 2/5 - 5

Which of the following is the explicit rule for a geometric sequence defined a recursive formula of a -5a for which the first term is 23?

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.

I’m really confused and need to learn this